Nefit fault code 3F 273
Fault code 3F 273 on a Nefit boiler (including TopLine and TrendLine) means: The boiler was switched off for a maximum of 2 minutes because the boiler has been in continuous operation for 24 hours. Reset the appliance once. If the code comes back, a part is usually faulty. You can check the water pressure and settings yourself; leave work on gas-carrying parts to a certified gas engineer.
After a safety alert (gas, flue gas, combustion), reset no more than once and call in a certified gas engineer. If you smell gas, call your national gas emergency number or 112 immediately.
Cause
Fault code 3F 273 on a Nefit boiler indicates: The boiler was switched off for a maximum of 2 minutes because the boiler has been in continuous operation for 24 hours.
Applies to
Nefit TopLine, TrendLine, Aquapower HRC 25 CW4, Aquapower HRC 25 CW4 II, Aquapower HRC 25 CW5, Aquapower HRC 25 CW5 II, Aquapower HRC 30 CW5, Aquapower HRC 30 CW5 II, Aquapower HRC 45 CW6, Aquapower HRC 45 CW6 II.
Fault code 3F 273 on other Nefit series
The same code does not mean the same thing on every series. Check the rating plate to see which series you have:
- 3F 273 on TopLine, HR 45 II: The boiler has been switched off for a maximum of 2 minutes because the boiler has been in continuous operation for 24 hours. This is a safety check.
- 3F 273 on TopLine, HR 100 II: The boiler was switched off for a maximum of 2 minutes.
- 3F 273 on EcomLine, Elite HRC 24 CW4, Elite HRC 30 CW5: The appliance was switched off for a few seconds because the appliance has been in continuous operation for 24 hours.
Matching parts
Nefit parts are available from Instalpunt; shipping to EU countries from €12.95 (€16.95 for more distant countries), usually 3–5 working days.
Parts per Nefit-series: ProLine (NxT) · TrendLine (II) · EcomLine · TopLine.
This message does not point directly to one faulty part. These are the parts that most often fit this appliance:
- Nefit pressure sensor with click connection for TopLine and ProLine etc. € 74.49
- Nefit automatic air vent € 26.14
- Nefit siphon gasket per 5 pcs for EcomLine and TopLine € 22.22
Fix it yourself or call an engineer?
Always consult the manual for your appliance and work safely. If in doubt or if the fault comes back, call in a qualified professional. A question about a part? Write to us at info@instalpunt.nl.
Frequently asked questions
What does Nefit boiler fault code 3F 273 mean?
The boiler was switched off for a maximum of 2 minutes because the boiler has been in continuous operation for 24 hours.
How do I fix fault code 3F 273 on a Nefit boiler?
First check the cause described above. Then restart the appliance using the reset button. If the message comes back, a part usually needs replacing or the fault needs to be repaired by a qualified professional.
Which parts do I need for Nefit fault code 3F 273?
That depends on the exact cause. In the Nefit parts overview at Instalpunt you will find the current price and stock for each part.
Can I fix fault code 3F 273 myself?
You can reset the appliance and check things like the water pressure or settings yourself. Work on gas-carrying parts must be left to a certified gas engineer.
All Nefit boiler faults and codes at a glance →